mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 03:30:52 +07:00
fdc0212e86
This commit adds two members in extent_status structure to let it record physical block and extent status. Here es_pblk is used to record both of them because physical block only has 48 bits. So extent status could be stashed into it so that we can save some memory. Now written, unwritten, delayed and hole are defined as status. Due to new member is added into extent status tree, all interfaces need to be adjusted. Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/*
|
|
* fs/ext4/extents_status.h
|
|
*
|
|
* Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
|
|
* Modified by
|
|
* Allison Henderson <achender@linux.vnet.ibm.com>
|
|
* Zheng Liu <wenqing.lz@taobao.com>
|
|
*
|
|
*/
|
|
|
|
#ifndef _EXT4_EXTENTS_STATUS_H
|
|
#define _EXT4_EXTENTS_STATUS_H
|
|
|
|
/*
|
|
* Turn on ES_DEBUG__ to get lots of info about extent status operations.
|
|
*/
|
|
#ifdef ES_DEBUG__
|
|
#define es_debug(fmt, ...) printk(fmt, ##__VA_ARGS__)
|
|
#else
|
|
#define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
|
|
#endif
|
|
|
|
#define EXTENT_STATUS_WRITTEN 0x80000000 /* written extent */
|
|
#define EXTENT_STATUS_UNWRITTEN 0x40000000 /* unwritten extent */
|
|
#define EXTENT_STATUS_DELAYED 0x20000000 /* delayed extent */
|
|
#define EXTENT_STATUS_HOLE 0x10000000 /* hole */
|
|
|
|
#define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN | \
|
|
EXTENT_STATUS_UNWRITTEN | \
|
|
EXTENT_STATUS_DELAYED | \
|
|
EXTENT_STATUS_HOLE)
|
|
|
|
struct extent_status {
|
|
struct rb_node rb_node;
|
|
ext4_lblk_t es_lblk; /* first logical block extent covers */
|
|
ext4_lblk_t es_len; /* length of extent in block */
|
|
ext4_fsblk_t es_pblk; /* first physical block */
|
|
};
|
|
|
|
struct ext4_es_tree {
|
|
struct rb_root root;
|
|
struct extent_status *cache_es; /* recently accessed extent */
|
|
};
|
|
|
|
extern int __init ext4_init_es(void);
|
|
extern void ext4_exit_es(void);
|
|
extern void ext4_es_init_tree(struct ext4_es_tree *tree);
|
|
|
|
extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
|
|
ext4_lblk_t len, ext4_fsblk_t pblk,
|
|
unsigned long long status);
|
|
extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
|
|
ext4_lblk_t len);
|
|
extern ext4_lblk_t ext4_es_find_extent(struct inode *inode,
|
|
struct extent_status *es);
|
|
|
|
static inline int ext4_es_is_written(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_WRITTEN);
|
|
}
|
|
|
|
static inline int ext4_es_is_unwritten(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_UNWRITTEN);
|
|
}
|
|
|
|
static inline int ext4_es_is_delayed(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_DELAYED);
|
|
}
|
|
|
|
static inline int ext4_es_is_hole(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_HOLE);
|
|
}
|
|
|
|
static inline ext4_fsblk_t ext4_es_status(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_FLAGS);
|
|
}
|
|
|
|
static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & ~EXTENT_STATUS_FLAGS);
|
|
}
|
|
|
|
static inline void ext4_es_store_pblock(struct extent_status *es,
|
|
ext4_fsblk_t pb)
|
|
{
|
|
ext4_fsblk_t block;
|
|
|
|
block = (pb & ~EXTENT_STATUS_FLAGS) |
|
|
(es->es_pblk & EXTENT_STATUS_FLAGS);
|
|
es->es_pblk = block;
|
|
}
|
|
|
|
static inline void ext4_es_store_status(struct extent_status *es,
|
|
unsigned long long status)
|
|
{
|
|
ext4_fsblk_t block;
|
|
|
|
block = (status & EXTENT_STATUS_FLAGS) |
|
|
(es->es_pblk & ~EXTENT_STATUS_FLAGS);
|
|
es->es_pblk = block;
|
|
}
|
|
|
|
#endif /* _EXT4_EXTENTS_STATUS_H */
|